Page 8
LAARS Heating Systems
Figure 6. Control Components
* Specify Serial Number
#
Part Description
Part #
1
Combustion Coil (Primary H-X) HWG
2400-086
Combustion Coil (Primary H-X) CB
2400-284
2
Economizer Coil (Secondary H-X)
10-078
3
Upper Head
10-034
4
Inner Shroud
10-112
5
Outer Shroud
10-124
6
Ignitor (w/Gasket) after s/n 391-126
791-044
2400-286
6
Ignitor, before s/n 391-127 791-045
2400-248
7
Burner (Flameholder) (w/Gaskets)
2400-082
Burner (w/Gaskets) (250 Series)
2400-308
8
Upper Insulation (Blanket)
10-048
9
Upper Insulation (Board)
10-050
10
Lower Insulation (Board)
10-106
11
Lower Insualtion (Blanket)
10-108
12
Gasket, Igniter (1 req'd)
10-332
13
Gasket, Burner (2 req'd)
10-338
14
Gasket, Blower Inlet (1 req'd)
1-254
15
Gasket, Blower Discharge (1 req'd)
10-324
Gasket, Blower Discharge (250 series)
11-066
16
Blower Assembly (w/Gaskets)
2400-079
Blower Assembly (w/Gaskets) (250)
2400-310
17
Orifice, Air
*
18
Orifice, Gas
*
19
Orifice Union
1-252
20
Mixer Tube
10-252
Mixer Tube (250 Series)
11-016
21
Air Duct Hose
1-458
Air Duct Hose (250 Series)
11-038
22
Gas Valve Balance Line
2400-026
*Not available separately - purchase orifice kit for type of gas
and input desired.
#
Part Description
Part #
23
Jacket, Front Removeable
10-402
24
Jacket, Top
10-406*
25
Jacket, Bottom
10-010
26
Control, Boiler Integrated
2400-224
27
Transformer, 40 VA
2400-006
28
Time Delay Relay
2400-062
29
Wiring Harness
10-354
30
Stack Switch
2400-110
31
Operating Control
2400-056
32
Safety Limit
2400-055
33
Intake T.C.O.
2400-058
34
Exhaust T.C.O.
2400-058
35
T.C.O.
2400-020
36
Gas Valve
2400-014
Gas Valve (250 Series)
2400-015
37
Capacitor (Blower Start/Run)
2400-088
38
Pump, Grundfos UP 26-99-BF CB
CB-250
HWG
HWG-250
2400-386
2400-387
2400-388
2400-389
39
Valve, Pressure Relief (150 PSI)
2400-094
Valve, Pressure Relief (250 Series)
2400-095
40
Valve, Pressure Relief (125 PSI)
2400-096
Valve, Pressure Relief (250 Series)
2400-097
41
Diverting Valve (Complete)
2400-001
42
Thermostat (O-Rings
included)(160°F)
before S/N 394-068 or 795-0014
2400-129
Thermostat (O-Rings
included)(140°F)
before S/N 394-067 or 795-0013
2400-130
43
Terminal, Intake
2400-102
44
Terminal, Exhaust
2400-104
45
Flange, Wall, Vent Pipe
2400-100
46
Exhaust Assembly
2400-390
Exhaust Assembly (250 Series)
2400-402
BLOWER
ASSEMBLY
BLOCKED
FLUE
DETECTOR
IGNITER ASSY
GAS VALVE
VENT
THERMAL
CUT OUT
INTAKE
THERMAL
CUT OUT
THERMAL
CUT OUT
16
30
6
36
34
33
35
32
HIGH LIMIT
SAFETY
SWITCH BOX
OPERATING LIMIT
CIRCULATOR PUMP
31
38
CONTROL BOX
SUB-ASSY
HEATMAKER
9600
